{
  "bibcode": "2026GCN.43473....1S",
  "createdOn": 1768928642917,
  "submitter": "Mike Siegel at PSU/Swift MOC <mhs18@psu.edu>",
  "eventId": "GRB 260114A",
  "format": "text/plain",
  "subject": "GRB 260114A: Swift/UVOT Upper Limits",
  "circularId": 43473,
  "submittedHow": "web",
  "body": "M.H. Siegel (PSU) and R. A. J. Eyles-Ferris (U Leicester) report on behalf of the Swift/UVOT team:\n\nThe Swift/UVOT began settled observations of the field of GRB 260114A 164 s after the BAT trigger (Eyles-Ferris et al., GCN Circ. 43396). No optical afterglow consistent with the XRT position (Beardmore et al., GCN Circ 43412) or the faint red counterpart (Li et al., GCN Circ. 43398; Volnova et al, GCN Circ. 43401) is detected in the initial UVOT exposures. Preliminary 3-sigma upper limits using the UVOT photometric system(Breeveld et al. 2011, AIP Conf. Proc. 1358, 373) for the first\nfinding chart (FC) exposure and subsequent exposures are:\n\nFilter         T_start(s)   T_stop(s)      Exp(s)         Mag\n\nwhite              164          848          102            >20.50\nv                  705         1100           52            >18.44\nb                  631          824           38            >19.22\nu                  507          799          136            >19.56\nuvw1               755          774           19            >17.70\nuvm2               730          750           19            >17.28\nuvw2               681         1080           58            >18.59\n\nThe magnitudes in the table are not corrected for the Galactic extinction\ndue to the reddening of E(B-V) = 0.069 in the direction of the burst\n(Schlegel et al. 1998)"
}